Diesel motor



June 8,1925. 1,587,578

H,- H. BLACHE DIESEL MOTOR .inne ti,

arena naive i-IENRIK refieran, or ooPnNHaeEN, DENMARK.

DIESEL IVIOTOR.

Application filed November 28, 1.919, Serial No. 341,230, and in DenmarkFebruary 9, 1918.

In Diesel inotors in which the valves are nioved by ineans of leverspivoted on a coninion shaft and operated by cains on a cani shaft it iscustomary' to place the levers of the fuel valve and the starting valveon a sleeve on said shaft so that the levers have diiilerenteccentricities as to greatness and position on the sleeve and hence inrelation to the shaft. Furthermore in the known constructions the sleeveis provided with a lever carrying a handle which may be manually setinto different positions corresponding to the dilierent positions of thesleeve thus obtaining that (l) Ihe starting valve works while the `fuelvalve is out of action.

(2) Both valves are out of action.

(3) The starting valve is out of action while the fuel valve works.

rlhis invention now relates to an arrangement by which the setting ofthe handle .is effected,automatically by the pressure of the startingair. In multi-cylinder Inotors, the improved arrangement enables allcylinders or groups of cylinders to be easily set from starting toigniting position in such a manner that the starting valvesare closedbefore the fuel valves are opened so that the resulting ignitions cannotl enter the starting valves.

A constructional forni of the invention `is shown in the drawing.

Fig. 1 is a vertical` section lon line 1-,1 of Fig. 2.

Fig. 2 is a plan view of lthe cover plate of a cylinder with appurtenantparts.

Figs. 3 and 4lshow the levers of the starting and fuel valves,respectively, on a larger scale.

Fig. 5 is an enlarged detail section on line 5-5,.Fig. 2.

a. and b are the starting and fuel valves, respectively, of. thecylinder which are both held on their seats b; springs c?, c andconnected byineans of Aars f, eto levers 7a, g pivoted on a fixed shaftz'. The levers g, 71. carry rollers j, /c to engage the cains m, aof thecani shaft Z. Jhen the latter is rotated by the in otor the earns arepressed against lthe rollers .whereby the levers g, v7i are oscillatedand the valves closed and opened. rihe levers g and 7i are directlyvmounted on a sleeveor inovable `fiile runi.element p '(se'e FistI 5)rotatably; .mounted .011. the .Shaft i and having twoeccentrp i ially-displaced relation, eac

forming a fulcruln for one of said levers.

A lever 0 is rigidly connected to sleeve 7? so that the latter is turnedabout shaft e' when lever o is turned. Consequently, when the lever 0 isturned, the centres of oscillation of the levers g and .71.' will beraised or lowered in such ainanner that when the centre of oscillationof the lever g is raised, then the centreA of oscillation of the leveris lowered and vice versa. By this arrangement the rollers /cand j arebrought into or out of engagement .with their corresponding canas a andm respectively. Y

Fig. 3 shows the sleeve in the position in which the starting valveworks. The centre Q of the eccentric sleeve is in its loi-.verinostposition. The lever 0 is in its uppermost position .when the lever 7L isin the position shown in Fig. 3 in which the roller 7c is influenced bythe cani n so that the starting valve will work.

Fig. t shows` the corresponding position of the fuel .valve lever. Theeccentricity of the sleeve p here is differentat least regards thedirection f roin what it is at the starting valve. rlhe centre r of thesleeve here is in its uppermost position which is also the case with thelever o which is in the saine position as in Fig. 3. In this position ofthe lever o the roller is in its uppermost position where it iscompletely free of the cam m so that the fuel valve will not work.

If the lever' o is turned to the position o', Figs, 3 and 4, the levers7L, g will be moved into the positions shown in dotted lines. In thesepositions the lever 7i. of the starting valve is raised so that ltheroller le is free of the cani a, the centre g of the eccentric sleevearound which the lever oscillates being raised to the position g. Thestarting valve, therefore, will leave oill working.

On turning'the lever o into the position o the lever g of the fuel valvewill loe lowered thus 'bringing the roller y' into engagement with thecani mv because of the centre r of the eccentric sleeve around ,whichthe lever g oseillates being inoved to yits lfowerniost 'posit-ion r. ceit folle .that feelin tarte OVNIs 1e knowngd o* .was .Carried 0st. byhandfdvlces prof ng-aut aticellyl this 'Srtle er"A @Thy means ,it thecniupp ied to' the inotol.

the. lever By4 the rr vided for 'e iter/,57s

On the cover of the cylinder a small cylinto active position and thefuel lever into inder s, Fig. l; is placed in which a spring t pressesdown piston g/ connected by a bar u with the lever o of the eccentricsleeve j), Figs. 3 and 4. The cylinder s communicates through thechannel 'U with the channel ra sapplyingI compressed air to the startingvalve a'. lVhen the spring t keeps the piston and therewith the lever oin their lowermos't position the levers g, 7L. will occupy the positionsshoivn in dotted lines in Figs. 3 and Also that, as above said, thestarting valve will be out of Working, While the fuel valve works.

Then compressed air flows through the channel :t a portion of it willalso simultaneously pass through the channel o to the cylinder s andraise the piston t thereby setting the lever o in its uppermostposition, i. e. the levers g, /t vvill occu;- y the positions shown inFigs, and el in which the starting valve Works While the fuel valve isout of operation. At the opening of the starting valve the motor isstarted and lept running by the pressure air, the starting valve onlyWorking so that no ignition v vill take place. When the motor hasobtained the necessary speed the compressed air 1s shut off andconsequently the spring t presses the piston y on to the bottom of thecylinder s. Hereby the lever 0 goes to its loivermost position andsimultaneously the lever 7L of the starting valve is raised so that itsroller becomes free of the cam while the lever g of the fuel valve islowered so that its roller engages its cam whereby the fuel valvefunctions and the ignitions ivill commence.

l. claiml. ln a Diesel engine, the combination, with a cylinder,separate starting and fuel valves therefor; and an operating lever foreach valve; of a cam shaft; a pair of cams thereon; one for each lever;a rotatable supporting shaft having two eccentric portions inmutually-displaced relation, each forming a fulcrum for one of saidlevers; and means controlled by the starting air supplied to the enginefor automatically shifting the rotatable supporting` shaft from oneposition to another so as to simultaneously move one lever into, and theother lever out of; operative position with relation lto theirrespective cams.

91. lu a Diesel engine; the combination, with a cylinder; separatestarting and fuel valves therefor, and an operatingJ lever for each vilve; of a cam shaft; a pair of cams thereon; one for each lever; amovable fulcrum element having tivo eccentric portions inmutually-displaced relation, each forming a fulcrum for one ofv saidlevers; and means controlled by the starting air supplied to the enginefor automatically shifting the fulcrum element from one position toanother 'so as to initially move the starting lever inactive positionwith relation to their respective cams, and to thereafter reverse theactivity of said levers.

3. ln a Diesel engine, the combination of a cylinder; and separatestarting and fuel valves therefor; a separate operating lever for eachval Ye; operatingl means individual to each lever; a rotatablesupporting element having tivo eccentric portions in mutuallydisplacedrelation, each forming a fulcrum for one of said levers; and meanscontrolled by the starting air supplied to the engine for automaticallyrotating said supporting element so to change the relation of saidfulcruni portions to the respective levers. and the consequent activityof said levers relative to their resp active operating means.

ln a Diesel engine, the combination of a cylinder, and separate startingand fuel valves therefor; a separate operating lever for each valve;operating means individual to each lever; a rotatable supporting elementhaving tivo eccentric portions in mutuallydisplaced relation, eachformingafulcrum for one of said levers; an actuating member connected tosaid supporting element to rotate the same so as to change the relationof said fulcrum portions to the respective levers and the consequentactivity of said levers relative to their respective operating means;and means controlled by the starting air supplied to the engine forautomatically operating said actuatingmember.

5. In a Diesel engine, the combination, with a cylinder, separatestarting and fuel valves therefor; and an operating lever for eachvalve; of a cam shaft; a pair of cams thereon, one for each lever; amovable fulcrum element having two different eccentric portions vvhereonsaid levers are directly mounted; and means controlled by the startingair supplied to the engine for automatically shifting the fulcrumelement from one position to another to govern the capability of the twolevers to be operated by their respective cams.

6. In a Diesel engine, the combination of a cylinder; separate startingand fuel valves therefor; separate operating means for each ialve; andmeans controlled by the starting air supplied to the engine forautomatically rendering one operating` means active and the otherinactive. i'

7. In a Diesel engine; he combination of a cylinder; separate startingand fuel valves therefor; separate operating means for each valve; andmeans controlled by the starting air supplied to the engine forautomatically contiolling the activity of the tivo operating means inreverse relation to each other.

8. In a Diesel engine, the combination of a cylinder; separate startingand fuel valves therefor; separate operating means for each 1,5 amr/evalve; and means controlled by the starting air supplied to the enginefor automatically rendering the starting,` valve operating meansalternately active and inactive, and the l'uel valve operatingmeansalternately inactive and active.

9. In a Diesel engine, the combination or" a cylinder7 and separatestarting` and inel valves therefor; a. separate operating lever for eachvalve; operating` means individual to each lever; a movable elementhaving if'ulcrnm means with Which said levers immediately oo-aet; anactuating member connected to shift said element so as to vary theposition of said fnlcrum means relative to said levers and theconsequent activity of the levers relative to their respective operatingmeans; and means controlled by the starting air supplied to the enginefor automatically operating said member.

l0. In a Diesel engine, the combination of a main. cylinder providedwith separate starting and inel valves7 and with an aisnpply channelleading to the starting' valve; separate operating` means for eachvalve; a device for controlling the activity of the tvvo operatingmeans; an auxiliary cylinder mounted on the main cylinder and having anair-supply channel leading,l to it from the tiret-named channel topermit a portion of the starting air to be deliver-ed to the auxiliarycylinder; and a piston in the auxiliary cylinder automatically operatedhy such air and connected to said controllingl device to actuate thesame when so operated.

1l. In a Diesel engine;l tl e combination of a main cylinder providedVith separat-e starting and 'fuel valves, and with ai airsnpply channellea-ding to the starting valve; separate operating` means i'orl eachvalve; a rotatable controllingl device for governing the cperativenessoi"- the tivo operating' means; an auxiliary cylinder mounted on themain cylinder and having an airsnpply channel leading;` to it liromrthe[irstnamed channel to permit a portion of the starting air to bedelivered to the auxiliary cylinder; and a piston in the auxiliarycylinder automatically operated by such air and connected to saidcontrolling` device to rotate the same when so operated.

In testimony whereof I my signa ture.

HANS HENRK BLACHE.

